EP2748042B1 - Arrangement for sealing a master cylinder on the side of the piston rod - Google Patents

Arrangement for sealing a master cylinder on the side of the piston rod Download PDF

Info

Publication number
EP2748042B1
EP2748042B1 EP12743689.7A EP12743689A EP2748042B1 EP 2748042 B1 EP2748042 B1 EP 2748042B1 EP 12743689 A EP12743689 A EP 12743689A EP 2748042 B1 EP2748042 B1 EP 2748042B1
Authority
EP
European Patent Office
Prior art keywords
region
master cylinder
seal component
piston rod
arrangement according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12743689.7A
Other languages
German (de)
French (fr)
Other versions
EP2748042A2 (en
Inventor
Frank Frietsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2748042A2 publication Critical patent/EP2748042A2/en
Application granted granted Critical
Publication of EP2748042B1 publication Critical patent/EP2748042B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • F16J15/3276—Mounting of sealing rings with additional static sealing between the sealing, or its casing or support, and the surface on which it is mounted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/236—Piston sealing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/06—Details
    • F15B7/08—Input units; Master units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F16D2025/081—Hydraulic devices that initiate movement of pistons in slave cylinders for actuating clutches, i.e. master cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/08—Details or arrangements of sealings not provided for in group F16D3/84

Definitions

  • the invention relates to an arrangement for the piston rod-side sealing of a master cylinder, as it is used in particular in hydraulically operating Kupplungsaus Weg- or in braking systems.
  • Piston rods of master cylinders perform both movements in the longitudinal direction of the piston rods and angular movements. These angular movements are in the region of the seal as transverse movements. Only for linear guides suitable sealing arrangements are therefore not applicable to donor cylinders of the present type.
  • Such arrangements are for example from the DE 10 2009 005 830 A1 , from the EP 1 512 882 A2 as well as from the GB 384724 A1 known.
  • a bellows increases its diameter when it is axially compressed. He can also deform in such a way that he no longer exclusively axially compresses the existing wrinkles.
  • such a bellows has a large axial length.
  • donor cylinders with bellows can not be used in cramped conditions.
  • Further problems can be seen in an increased use of materials. Namely, if long-term stable materials are used for the bellows, the rise Cost of this significantly.
  • bellows require constant control despite all precautions.
  • Another known solution provides for the use of a simple dirt cap made of an elastic material. Through this dirt cap slides the piston rod of the master cylinder, for example, when disengaging.
  • a problem with this solution is that there is an increased friction on the piston rod and therefore increased pedal forces are required.
  • such protective caps are susceptible to wear, so that the risk of contamination and the maintenance costs are significantly increased.
  • the object of the present invention is to provide an arrangement for piston-side sealing of a master cylinder, which allows a small-sized master cylinder, especially for hydraulically actuated clutch or brake systems, which in terms of its tightness in terms of penetration of dirt high standards.
  • Palmate rods is the actuating element of the master cylinder, which is designed at least in the region of the seal as a cylindrical part.
  • “Sealing” refers to the measure by which the entirety of the parts of the master cylinder against external influences, especially against dirt, are sealed.
  • the object is achieved by an arrangement for piston rod side seal of a master cylinder, wherein the piston rod connected to the piston of the master cylinder is protected in relation to the housing of the master cylinder by a bellows-like seal against the ingress of dirt into the master cylinder.
  • the seal is formed in two parts and comprises a first relatively elastic sealing component and a second, relatively inelastic sealing component, wherein the first sealing component is on the one hand tightly connected to the housing of the master cylinder and on the other hand tightly connected to the second sealing component.
  • the second sealing member is arranged close to the piston rod and slidable on this.
  • an arrangement for piston rod side sealing of a master cylinder is created compared to the solutions known from the prior art advantageously having a significantly reduced wear and a significantly improved life at a relatively short length of the seal.
  • This is achieved in particular by the fact that for the different tasks of the seal, such as absolute dust protection, compliance, optimized friction behavior or optimal tribological behavior and wear resistance, through the division into two sealing components, each optimum conditions and material properties at separate locations, namely in the field of the housing can be selected by the first sealing member and in the region of the piston rod by the second sealing member and compromises are unnecessary.
  • the first sealing member is made of an elastomeric material. It is preferably formed cap-shaped. The type of material and its properties can be chosen depending on the type of sealing required.
  • the second sealing component is preferably annular. It can be optimized with respect to its Reibwertparameter compared to the piston rod material and the gap dimensions so that a good friction while ensuring sufficient tightness against dirt is guaranteed. Particularly advantageous is an embodiment in which on the outer circumference of the annular second sealing member at least one circumferential groove is provided, into which engages a radially inner edge of a central recess of the first connecting member.
  • the second sealing component consists of a relatively inelastic, hard material, in particular a polymer material.
  • the material of the second sealing component can be optimized in terms of the properties of a friction pairing to the piston rod material.
  • the cap-shaped first sealing component can on the one hand engage tightly with a bead area in a groove arranged in the outer diameter of the master cylinder, while on the other hand it engages with a bead-shaped edge region of an inner, central recess in a groove of the second sealing component.
  • the cap-shaped first sealing member may have an axially extending wall portion and a radially extending wall portion, wherein the axially extending wall portion preferably engages over a disposed in a circumferential groove of the housing of the master cylinder ring which prevents slipping of the axially extending wall portion, wherein the axially extending wall portion On its side facing away from the radially extending wall region has a radially extending in the direction of the piston rod, bead-shaped region which also overlaps the ring.
  • the first sealing part expediently has, between the radially extending wall region and the bead-shaped edge region, a bellows-type region, which forms the Increased flexibility of the first sealing component.
  • This bellows-like region extends in a preferred embodiment of the invention, starting from the radially extending wall portion initially obliquely in the direction of the piston and subsequently again obliquely in the opposite direction to its bead-shaped edge region which engages in the groove of the second seal member.
  • a master cylinder 1 of the present arrangement accommodates a piston 3 in its cylinder bore 2 arranged in its housing 6.
  • a bore 4 of the piston 3 engages a piston rod 5 a.
  • an arrangement for sealing the piston rod 5 is arranged with respect to the housing 6.
  • the arrangement for sealing comprises a first sealing component 7 and a second sealing component 8.
  • the first sealing component 7 is configured in the shape of a cap and has an annular wall region 9 extending radially to the longitudinal axis of the master cylinder 1 and a wall region 10 which runs concentrically to the said longitudinal axis.
  • the wall portion 10 has at its end facing the piston 3 a radially in the direction of the housing 6 projecting bead-shaped portion 11 whose inner diameter is smaller than the outer diameter 13 of the housing 6.
  • the inner circumference of the bead-shaped portion 11 is therefore fixed and tight on Outside circumference of the housing 6 at.
  • the bead-shaped region 11 preferably has a greater thickness than the wall region 10. It is expediently also conceivable for the bead-shaped region 11 to tightly engage in a circumferential groove 12 of the housing 6.
  • the bead-shaped region 11 preferably overlaps a ring 14, which at least partially engages in a groove 15 of the housing 6 and gives the first sealing component 7 additional security against axial slipping off the housing 6.
  • the first sealing component 7 has a further bead-shaped thickened edge region 16 in the area of the inner circumference of its radially extending wall region 9, wherein the first sealing part 7 between the inner end of the radially extending wall portion 9 and the bead-shaped edge portion 16, preferably initially arcuately starting from the inner end in the direction of the piston 3 and then again in the direction of the piston 3 remote from the side.
  • a high elasticity of the first preferably made of a rubber material sealing component 7 is achieved, which thereby also receives the function of a bellows.
  • the second sealing component 8 has the shape of a sliding ring arranged on the piston rod 5, which has a groove 17 into which the bead-shaped edge region 16 of the first sealing component 7 tightly engages.
  • the second sealing component 8 is made of a material that has a greater hardness than the material of the first sealing component 7.
  • the second sealing component 8 consists of a polymer material.
  • the bead-shaped region 16 has a smaller inner radius than the radius of the groove 17.
  • the second sealing member 8 can perform these movements without axial displacements on the piston rod 5, since the first sealing member 7 because of its bellows-like design and its elastic properties can absorb and balance these movements.
  • first sealing component 7 with its wall portion 10 and the radially beyond the front end of the housing 1 protruding outer region 20 of its annular wall portion 9 in particular still further yield axially when the radially extending wall portion 9 with its piston 3 facing the inner surface a tapered end of the housing 6 is supported.
  • the invention advantageously allows a seal of the interior of the housing 6 of a master cylinder 1 with respect to the piston rod 5 thereof, wherein the cover of the entire cylinder-piston-piston rod portion of the master cylinder 1 is achieved with a first relatively elastic, bellows-like seal member 7 and at the same time a seal in the region of the piston rod 5 is achieved with an optimized second, relatively inelastic and hard sealing component 8.
  • This seal creates optimal conditions with regard to the tightness and the friction conditions.
  • the space required for the seal is relatively small.

Description

Die Erfindung betrifft eine Anordnung zur kolbenstangenseitigen Abdichtung eines Geberzylinders, wie er insbesondere in hydraulisch arbeitenden Kupplungsausrück- oder in Bremssystemen eingesetzt wird.The invention relates to an arrangement for the piston rod-side sealing of a master cylinder, as it is used in particular in hydraulically operating Kupplungsausrück- or in braking systems.

Die Lebensdauer solcher Geberzylinder hängt im Wesentlichen von der Dichtigkeit zwischen Zylinder und Kolben ab. Bei den oben erwähnten hydraulischen Systemen handelt es sich im Allgemeinen um solche, die mit einem eng bemessenen Vorrat an Druckmedium arbeiten und nicht an ein Versorgungssystem angeschlossen sind, aus dem ständig Druckmedium nachgefördert wird. Daraus ergibt sich, dass die in solchen Systemen eingesetzten Baugruppen vor allem auf geringe Leckagen hin ausgelegt werden müssen. Für Geberzylinder bedeutet dies, dass sie gegen die Einwirkung von Schmutz auf die Zylinder-Kolben-Kolbenstangen-Baugruppe geschützt werden müssen.The life of such master cylinder depends essentially on the tightness between the cylinder and piston. The hydraulic systems mentioned above are generally those which operate with a narrow supply of pressure medium and are not connected to a supply system from which pressure fluid is constantly being delivered. It follows that the assemblies used in such systems must be designed especially for low leaks. For master cylinder, this means that they must be protected against the action of dirt on the cylinder-piston-piston rod assembly.

Kolbenstangen von Geberzylindern führen sowohl Bewegungen in Längsrichtung der Kolbenstangen als auch Winkelbewegungen aus. Diese Winkelbewegungen stellen sich im Bereich der Abdichtung als Querbewegungen dar. Ausschließlich für lineare Führungen geeignete Dichtungsanordnungen sind daher bei Geberzylindern der vorliegenden Art nicht anwendbar.Piston rods of master cylinders perform both movements in the longitudinal direction of the piston rods and angular movements. These angular movements are in the region of the seal as transverse movements. Only for linear guides suitable sealing arrangements are therefore not applicable to donor cylinders of the present type.

Bekannterweise werden daher Geberzylinder kolbenstangenseitig mit Faltenbälgen abgedichtet. Solche Faltenbälge kapseln den Bereich zwischen dem Gehäuse des Geberzylinders und der Kolbenstange vollständig ab, indem sie mit beiden dicht verbunden sind.As is known, therefore, master cylinder piston rod side sealed with bellows. Such bellows completely encapsulate the area between the housing of the master cylinder and the piston rod by being tightly connected to both.

Derartige Anordnungen sind beispielsweise aus der DE 10 2009 005 830 A1 , aus der EP 1 512 882 A2 sowie aus der GB 384724 A1 bekannt.Such arrangements are for example from the DE 10 2009 005 830 A1 , from the EP 1 512 882 A2 as well as from the GB 384724 A1 known.

Die voran stehend beschriebene Ausführungsform ist aber problematisch. Ein Faltenbalg vergrößert seinen Durchmesser, wenn er axial gestaucht wird. Er kann sich zudem auch auf eine Weise so deformieren, dass er nicht mehr ausschließlich die vorhandenen Falten axial staucht. Zudem weist ein solcher Faltenbalg eine große axiale Länge auf. Beim Einbau in übergeordnete Systeme ist deshalb ein entsprechender Freiraum für den Faltenbalg vorzusehen. Daraus ergibt sich, dass bei beengten räumlichen Verhältnissen Geberzylinder mit Faltenbälgen nicht einsetzbar sind. Weitere Probleme sind in einem erhöhten Materialeinsatz zu sehen. Werden nämlich langzeitstabile Materialien für die Faltenbälge eingesetzt, steigen die Kosten für diese deutlich an. Außerdem bedürfen Faltenbälge trotz aller Vorkehrungen ständig einer Kontrolle. Wird nicht erkannt, dass ein Faltenbalg gerissen oder beschädigt ist, kann Schmutz in die Zylinder-Kolben-Kolbenstangen-Baugruppe eindringen und den gesamten Geberzylinder unbrauchbar machen. Eindringender Schmutz kann Leckagen verursachen. Der eindringend Schmutz kann z. B. die Dichtungslaufbahn an dem Kolben des Geberzylinders beschädigen. Durch entstehende Kratzer kann das im Kolben enthaltene Medium nach außen entweichen. Eine richtige Funktion des Geberzylinders ist dann nicht mehr möglich.However, the embodiment described above is problematic. A bellows increases its diameter when it is axially compressed. He can also deform in such a way that he no longer exclusively axially compresses the existing wrinkles. In addition, such a bellows has a large axial length. When installing in higher-level systems, therefore, a corresponding clearance for the bellows is provided. As a result, donor cylinders with bellows can not be used in cramped conditions. Further problems can be seen in an increased use of materials. Namely, if long-term stable materials are used for the bellows, the rise Cost of this significantly. In addition, bellows require constant control despite all precautions. Failure to detect that a bellows is cracked or damaged may allow dirt to enter the cylinder-piston-rod assembly and render the entire master cylinder unusable. Ingress of dirt can cause leaks. The penetrating dirt can z. B. damage the seal raceway on the piston of the master cylinder. As a result of scratches, the medium contained in the piston can escape to the outside. A correct function of the master cylinder is then no longer possible.

Eine weitere bekannte Lösung sieht den Einsatz einer einfachen Schmutzkappe aus einem elastischen Material vor. Durch diese Schmutzkappe gleitet die Kolbenstange des Geberzylinders beispielsweise beim Auskuppeln hindurch. Allerdings besteht ein Problem dieser Lösung darin, dass eine erhöhte Reibung an der Kolbenstange zu verzeichnen ist und dass deshalb erhöhte Pedalkräfte erforderlich werden. Zudem sind solche Schutzkappen verschleißanfällig, sodass das Verschmutzungsrisiko und der Instandhaltungsaufwand deutlich erhöht werden.Another known solution provides for the use of a simple dirt cap made of an elastic material. Through this dirt cap slides the piston rod of the master cylinder, for example, when disengaging. However, a problem with this solution is that there is an increased friction on the piston rod and therefore increased pedal forces are required. In addition, such protective caps are susceptible to wear, so that the risk of contamination and the maintenance costs are significantly increased.

Die Ansprüche an die Zuverlässigkeit von Geberzylindern steigen jedoch stetig. Dies wird beispielsweise durch den immer mehr zunehmenden Einsatz von Fahrzeugen in erhöht schmutz- bzw. staubbelasteten Regionen, wie beispielsweise beim Offroad-Fahren, beim Fahren in Wüstengebieten oder beim Fahren in Territorien mit unbefestigten Straßen, verursacht.However, the demands on the reliability of master cylinders are increasing steadily. This is caused, for example, by the ever-increasing use of vehicles in increased dirt or dust-laden regions, such as off-road driving, driving in desert areas, or driving in non-paved terrain.

Unter Beachtung der sich aus den oben aufgeführten Nachteilen ergebenden Notwendigkeiten besteht die Aufgabe der vorliegenden Erfindung darin, eine Anordnung zur kolbenseitigen Abdichtung eines Geberzylinders zu schaffen, die einen kleinbauenden Geberzylinder, insbesondere für hydraulisch betätigte Kupplungs- bzw. Bremssysteme, ermöglicht, der hinsichtlich seiner Dichtigkeit in Bezug auf ein Eindringen von Schmutz hohen Ansprüchen genügt.Taking into account the needs arising from the disadvantages listed above, the object of the present invention is to provide an arrangement for piston-side sealing of a master cylinder, which allows a small-sized master cylinder, especially for hydraulically actuated clutch or brake systems, which in terms of its tightness in terms of penetration of dirt high standards.

Die Aufgabe wird gelöst durch eine kolbenstangenseitige Abdichtung für einen Geberzylinder mit den Merkmalen des kennzeichnenden Teils des Patentanspruches 1 in Verbindung mit den Merkmalen des Oberbegriffes dieses Patentanspruches.The object is achieved by a piston rod side seal for a master cylinder with the features of the characterizing part of claim 1 in conjunction with the features of the preamble of this claim.

Nachgeordnete Patentansprüche betreffen besondere Ausführungsformen der gemäß Patentanspruch vorgeschlagenen Erfindung und beschränken die Erfindung als solche nicht.Subordinate claims relate to particular embodiments of the proposed invention according to claim and do not limit the invention as such.

In der nachfolgenden Beschreibung der Erfindung, den Ausführungsbeispielen und den Patentansprüchen werden die nachstehend aufgeführten Begriffe mit folgendem Sinngehalt verwendet:

  • "Geberzylinder" ist ein hydraulischer Arbeitszylinder, der über eine Kolbenstange mit einer von außen einwirkenden Kraft beaufschlagt wird, durch die ein Verschieben des Kolbens im Zylinder erfolgt und ein im Zylinderraum vorhandenes Druckmedium verdrängt wird. Solcher Art Zylinder werden vorrangig bei hydraulischen Übertragungssystemen eingesetzt, bei denen dem Geberzylinder ein oder mehrere Nehmerzylinder zugeordnet sind.
In the following description of the invention, the working examples and the claims, the following terms are used with the following meaning:
  • "Master cylinder" is a hydraulic working cylinder, which is acted upon via a piston rod with an externally acting force, by which a displacement of the piston takes place in the cylinder and a pressure medium present in the cylinder chamber is displaced. Such kind of cylinder are used primarily in hydraulic transmission systems in which the master cylinder one or more slave cylinders are assigned.

"Kolbenstangen" ist das Betätigungselement des Geberzylinders, das zumindest im Bereich der Abdichtung als zylindrisches Teil ausgeführt ist."Piston rods" is the actuating element of the master cylinder, which is designed at least in the region of the seal as a cylindrical part.

"Abdichtung" betrifft die Maßnahme, durch die die Gesamtheit der Teile des Geberzylinders gegen äußere Einflüsse, vor allem gegen Schmutz, abdichtet werden."Sealing" refers to the measure by which the entirety of the parts of the master cylinder against external influences, especially against dirt, are sealed.

Erfindungsgemäß wird die Aufgabe durch eine Anordnung zur kolbenstangenseitigen Abdichtung eines Geberzylinders gelöst, bei der die mit dem Kolben des Geberzylinders verbundene Kolbenstange in Bezug auf das Gehäuse des Geberzylinders durch eine faltenbalgartige Abdichtung vor dem Eindringen von Schmutz in den Geberzylinder geschützt wird. Die Abdichtung ist zweiteilig ausgebildet und umfasst ein erstes relativ elastisches Dichtungsbauteil und ein zweites, relativ unelastisches Dichtungsbauteil, wobei das erste Dichtungsbauteil einerseits dicht mit dem Gehäuse des Geberzylinders und andererseits dicht mit dem zweiten Dichtungsbauteil in Verbindung steht. Das zweite Dichtungsbauteil ist dicht auf der Kolbenstange angeordnet und auf dieser verschiebbar.According to the invention the object is achieved by an arrangement for piston rod side seal of a master cylinder, wherein the piston rod connected to the piston of the master cylinder is protected in relation to the housing of the master cylinder by a bellows-like seal against the ingress of dirt into the master cylinder. The seal is formed in two parts and comprises a first relatively elastic sealing component and a second, relatively inelastic sealing component, wherein the first sealing component is on the one hand tightly connected to the housing of the master cylinder and on the other hand tightly connected to the second sealing component. The second sealing member is arranged close to the piston rod and slidable on this.

Mithin wird gegenüber den aus dem Stand der Technik bekannten Lösungen vorteilhafter Weise erfindungsgemäß eine Anordnung zur kolbenstangenseitigen Abdichtung eines Geberzylinders geschaffen, die bei einer relativ kurzen Baulänge der Abdichtung einen wesentlich verringerten Verschleiß und eine wesentlich verbesserte Lebensdauer aufweist. Dies wird insbesondere dadurch erreicht, dass für die unterschiedlichen Aufgaben der Abdichtung, wie absoluter Staubschutz, Nachgiebigkeit, optimiertes Reibverhalten bzw. optimales tribologisches Verhalten und Verschleißfestigkeit, durch die Aufteilung in zwei Dichtungsbauteile, die jeweils optimalen Bedingungen und Materialeigenschaften an getrennten Orten, nämlich im Bereich des Gehäuses durch das erste Dichtungsbauteil und im Bereich der Kolbenstange durch das zweite Dichtungsbauteil gewählt werden können und Kompromisse unnötig sind.Thus, according to the invention an arrangement for piston rod side sealing of a master cylinder is created compared to the solutions known from the prior art advantageously having a significantly reduced wear and a significantly improved life at a relatively short length of the seal. This is achieved in particular by the fact that for the different tasks of the seal, such as absolute dust protection, compliance, optimized friction behavior or optimal tribological behavior and wear resistance, through the division into two sealing components, each optimum conditions and material properties at separate locations, namely in the field of the housing can be selected by the first sealing member and in the region of the piston rod by the second sealing member and compromises are unnecessary.

Bei einer bevorzugten Ausführungsform besteht das erste Dichtungsteil aus einem ElastomerMaterial. Es ist dabei vorzugsweise kappenförmig ausgebildet. Die Art des Materials und dessen Eigenschaften können dabei abhängig von der Art der gewünschten Abdichtung gewählt werden.In a preferred embodiment, the first sealing member is made of an elastomeric material. It is preferably formed cap-shaped. The type of material and its properties can be chosen depending on the type of sealing required.

Das zweite Dichtungsbauteil ist vorzugsweise ringförmig ausgebildet. Es kann hinsichtlich seiner Reibwertparameter gegenüber dem Kolbenstangenwerkstoff und den Spaltabmessungen so optimiert werden, das ein gutes Reibverhalten bei zugleich ausreichender Dichtigkeit gegenüber Schmutz gewährleistet ist. Besonders vorteilhaft ist eine Ausführungsform, bei der an dem Außenumfang des ringförmigen zweiten Dichtungsbauteiles wenigstens eine umlaufende Nut vorgesehen ist, in die ein radial innerer Rand einer mittigen Aussparung des ersten Verbindungsbauteiles eingreift.The second sealing component is preferably annular. It can be optimized with respect to its Reibwertparameter compared to the piston rod material and the gap dimensions so that a good friction while ensuring sufficient tightness against dirt is guaranteed. Particularly advantageous is an embodiment in which on the outer circumference of the annular second sealing member at least one circumferential groove is provided, into which engages a radially inner edge of a central recess of the first connecting member.

Bevorzugt wird eine Ausführungsform, bei der das zweite Dichtungsbauteil aus einem relativ unelastischen, harten Material, insbesondere einem Polymer-Material besteht. Das Material des zweiten Dichtungsbauteiles kann hinsichtlich der Eigenschaften einer Reibpaarung zum Kolbenstangenmaterial optimiert werden.An embodiment is preferred in which the second sealing component consists of a relatively inelastic, hard material, in particular a polymer material. The material of the second sealing component can be optimized in terms of the properties of a friction pairing to the piston rod material.

Das kappenförmige erste Dichtungsbauteil kann einerseits mit einem Wulstbereich dicht in eine im Außendurchmesser des Geberzylinders angeordnete Nut eingreifen, während es andererseits mit einem wulstförmigen Randbereich einer inneren, mittigen Aussparung in eine Nut des zweiten Dichtungsbauteils eingreift.The cap-shaped first sealing component can on the one hand engage tightly with a bead area in a groove arranged in the outer diameter of the master cylinder, while on the other hand it engages with a bead-shaped edge region of an inner, central recess in a groove of the second sealing component.

Ferner kann das kappenförmig ausgebildete erste Dichtungsbauteil einen axial verlaufenden Wandbereich sowie einen radial verlaufenden Wandbereich aufweisen, wobei der axial verlaufende Wandbereich vorzugsweise einen in eine Umfangsnut des Gehäuse des Geberzylinders angeordneten Ring übergreift, der ein Abrutschen des axial verlaufenden Wandbereiches verhindert, wobei der axial verlaufende Wandbereich an seiner dem radial verlaufenden Wandbereich abgewandten Seite einen radial in Richtung auf die Kolbenstange verlaufenden, wulstförmigen Bereich aufweist, der den Ring ebenfalls übergreift.Further, the cap-shaped first sealing member may have an axially extending wall portion and a radially extending wall portion, wherein the axially extending wall portion preferably engages over a disposed in a circumferential groove of the housing of the master cylinder ring which prevents slipping of the axially extending wall portion, wherein the axially extending wall portion On its side facing away from the radially extending wall region has a radially extending in the direction of the piston rod, bead-shaped region which also overlaps the ring.

Das erste Dichtungsteil weist zweckmäßigerweise zwischen dem radial verlaufenden Wandbereich und dem wulstförmigen Randbereich einen faltenbalgartigen Bereich auf, der die Flexibilität des ersten Dichtungsbauteiles erhöht. Dieser faltenbalgartige Bereich verläuft bei einer bevorzugten Ausführungsform der Erfindung ausgehend von dem radial verlaufenden Wandbereich zunächst schräg in Richtung auf den Kolben und nachfolgend wieder schräg in die entgegen gesetzte Richtung zu seinem wulstförmigen Randbereich, der in die Nut des zweiten Dichtungsteiles eingreift.The first sealing part expediently has, between the radially extending wall region and the bead-shaped edge region, a bellows-type region, which forms the Increased flexibility of the first sealing component. This bellows-like region extends in a preferred embodiment of the invention, starting from the radially extending wall portion initially obliquely in the direction of the piston and subsequently again obliquely in the opposite direction to its bead-shaped edge region which engages in the groove of the second seal member.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels und einer Zeichnung näher beschrieben. Dabei zeigt:

Figur 1:
eine Schnittdarstellung des kolbenstangenseitigen Endes eines Geberzylinders mit den für die erfindungsgemäße Abdichtung erforderlichen Bauteilen in einer bevorzugten Ausführungsform.
The invention will be described below with reference to an embodiment and a drawing. Showing:
FIG. 1:
a sectional view of the piston rod end of a master cylinder with the components required for the sealing according to the invention in a preferred embodiment.

Ein Geberzylinder 1 der vorliegenden Anordnung nimmt in seiner, in seinem Gehäuse 6 angeordneten Zylinderbohrung 2 einen Kolben 3 auf. In eine Bohrung 4 des Kolbens 3 greift eine Kolbenstange 5 ein. An dem der Kolbenstange 5 zugewandten Ende des Gehäuses 6 des Geberzylinders 1 ist eine Anordnung zur Abdichtung der Kolbenstange 5 in Bezug auf das Gehäuse 6 angeordnet. Die Anordnung zur Abdichtung umfasst ein erstes Dichtungsbauteil 7 und ein zweites Dichtungsbauteil 8.A master cylinder 1 of the present arrangement accommodates a piston 3 in its cylinder bore 2 arranged in its housing 6. In a bore 4 of the piston 3 engages a piston rod 5 a. At the piston rod 5 facing the end of the housing 6 of the master cylinder 1, an arrangement for sealing the piston rod 5 is arranged with respect to the housing 6. The arrangement for sealing comprises a first sealing component 7 and a second sealing component 8.

Das erste Dichtungsbauteil 7 ist kappenförmig ausgestaltet und weist einen radial zur Längsachse des Geberzylinders 1 verlaufenden, kreisringförmige Wandbereich 9 und einen Wandbereich 10 auf, der konzentrisch zu der genannten Längsachse verläuft. Der Wandbereich 10 weist an seinem dem Kolben 3 zugewandten Endbereich einen radial in Richtung auf das Gehäuse 6 vorstehenden wulstförmigen Bereich 11 auf, dessen Innendurchmesser kleiner ist, als der Außendurchmesser 13 des Gehäuses 6. Der Innenumfang des wulstförmigen Bereiches 11 liegt daher fest und dicht am Außenumfang des Gehäuses 6 an. Vorzugsweise besitzt der wülstförmige Bereich 11 eine größere Dicke als der Wandbereich 10. Es ist zweckmäßigerweise auch denkbar, dass der wulstförmige Bereich 11 in eine Umfanngsnut 12 des Gehäuses 6 dicht eingreift.The first sealing component 7 is configured in the shape of a cap and has an annular wall region 9 extending radially to the longitudinal axis of the master cylinder 1 and a wall region 10 which runs concentrically to the said longitudinal axis. The wall portion 10 has at its end facing the piston 3 a radially in the direction of the housing 6 projecting bead-shaped portion 11 whose inner diameter is smaller than the outer diameter 13 of the housing 6. The inner circumference of the bead-shaped portion 11 is therefore fixed and tight on Outside circumference of the housing 6 at. The bead-shaped region 11 preferably has a greater thickness than the wall region 10. It is expediently also conceivable for the bead-shaped region 11 to tightly engage in a circumferential groove 12 of the housing 6.

Der wulstförmige Bereich 11 übergreift vorzugsweise einen Ring 14, der zumindest teilweise in eine Nut 15 des Gehäuses 6 eingreift und dem ersten Dichtungsbauteil 7 eine zusätzliche Sicherheit gegen ein axiales Abrutschen vom Gehäuse 6 verleiht.The bead-shaped region 11 preferably overlaps a ring 14, which at least partially engages in a groove 15 of the housing 6 and gives the first sealing component 7 additional security against axial slipping off the housing 6.

Das erste Dichtungsbauteil 7 weist im Gebiet des Innenumfanges seines radial verlaufenden Wandbereiches 9 einen weiteren wulstförmig verdickten Randbereich 16 auf, wobei das erste Dichtungsteil 7 zwischen dem inneren Ende des radial verlaufende Wandbereiches 9 und dem wulstförmigen Randbereich 16, vorzugsweise ausgehend von dem inneren Ende zunächst bogenförmig in Richtung auf den Kolben 3 und anschließend wieder in Richtung auf die dem Kolben 3 abgewandte Seite verläuft. Dadurch wird eine hohe Elastizität des vorzugsweise aus einem Gummimaterial bestehenden ersten Dichtungsbauteiles 7 erreicht, das dadurch außerdem die Funktion eines Faltenbalges erhält.The first sealing component 7 has a further bead-shaped thickened edge region 16 in the area of the inner circumference of its radially extending wall region 9, wherein the first sealing part 7 between the inner end of the radially extending wall portion 9 and the bead-shaped edge portion 16, preferably initially arcuately starting from the inner end in the direction of the piston 3 and then again in the direction of the piston 3 remote from the side. As a result, a high elasticity of the first preferably made of a rubber material sealing component 7 is achieved, which thereby also receives the function of a bellows.

Das zweite Dichtungsbauteil 8 weist die Form eines auf der Kolbenstange 5 angeordneten Gleitringes auf, der eine Nut 17 besitzt, in die der wulstförmige Randbereich 16 des ersten Dichtungsbauteiles 7 dicht eingreift. Das zweite Dichtungsbauteil 8 besteht aus einem Material, das eine größere Härte besitzt als das Material des ersten Dichtungsbauteiles 7. Vorzugsweise besteht das zweite Dichtungsbauteil 8 aus einem Polymermaterial.The second sealing component 8 has the shape of a sliding ring arranged on the piston rod 5, which has a groove 17 into which the bead-shaped edge region 16 of the first sealing component 7 tightly engages. The second sealing component 8 is made of a material that has a greater hardness than the material of the first sealing component 7. Preferably, the second sealing component 8 consists of a polymer material.

Der wulstförmige Bereich 16 besitzt einem kleineren Innenradius als dem Radius der Nut 17. Zwischen dem zweiten Dichtungsbauteil 8 und dem Außendurchmesser 18 der Kolbenstange 5 besteht eine Reibpaarung. Das heißt, das zweite Dichtungsbauteil 8 kann sich auf der Kolbenstange 5 bewegen. Dies ist typischerweise der Fall, wenn die Kolbenstange 5 bei der Betätigung des Geberzylinders 1 bewegt wird. In diesem Fall gleitet das zweite Dichtungsbauteil 8 auf der Kolbenstange 5.The bead-shaped region 16 has a smaller inner radius than the radius of the groove 17. There is a frictional pairing between the second sealing component 8 and the outer diameter 18 of the piston rod 5. That is, the second seal member 8 can move on the piston rod 5. This is typically the case when the piston rod 5 is moved during the actuation of the master cylinder 1. In this case, the second seal member 8 slides on the piston rod 5.

Wenn auf die Kolbenstange 5 oder auf den Geberzylinder 1 relative kleine Schwingungen einwirken, die zu Relativbewegungen zwischen diesen beiden Bauteilen führen, kann das zweite Dichtungsbauteil 8 diese Bewegungen ohne axiale Verschiebungen auf der Kolbenstange 5 ausführen, da das erste Dichtungsbauteil 7 wegen seiner faltenbalgartigen Ausgestaltung und seiner elastischen Eigenschaften diese Bewegungen aufnehmen und ausgleichen kann.When relative to the piston rod 5 or on the master cylinder 1 act relatively small oscillations, which lead to relative movements between these two components, the second sealing member 8 can perform these movements without axial displacements on the piston rod 5, since the first sealing member 7 because of its bellows-like design and its elastic properties can absorb and balance these movements.

Zudem kann das erste Dichtungsbauteil 7 mit seinem Wandbereich 10 und dem radial über das vordere Ende des Gehäuses 1 vorstehenden äußeren Bereich 20 seines kreisringförmigen Wandbereiches 9 insbesondere noch dann weiter axial nachgeben, wenn sich der radial verlaufende Wandbereich 9 mit seiner dem Kolben 3 zugewandten Innenfläche auf einem spitz zulaufenden Ende des Gehäuses 6 anstützt.In addition, the first sealing component 7 with its wall portion 10 and the radially beyond the front end of the housing 1 protruding outer region 20 of its annular wall portion 9 in particular still further yield axially when the radially extending wall portion 9 with its piston 3 facing the inner surface a tapered end of the housing 6 is supported.

Damit kann sichergestellt werden, dass das zweite Dichtungsbauteil 8 nur dann eine Relativbewegung auf der Kolbenstange 5 ausführt, wenn deren Betätigungsweg eine bestimmte Größe überschreitet. Somit entsteht zwischen dem zweiten Dichtungsbauteil 8 und der Kolbenstange 5 nur wenig Reibung. Ein Verschleiß wird daher weitgehend vermieden.It can thus be ensured that the second sealing component 8 only performs a relative movement on the piston rod 5 when its actuating travel exceeds a certain size. Thus arises between the second sealing member 8 and the piston rod 5 only little friction. Wear is therefore largely avoided.

Die Erfindung ermöglicht also vorteilhafter Weise eine Abdichtung des Inneren des Gehäuses 6 eines Geberzylinders 1 in Bezug auf die Kolbenstange 5 desselben, wobei mit einem ersten relativ elastischen, faltenbalgartigen Dichtungsbauteil 7 die Abdeckung des gesamten Zylinder-Kolben-Kolbenstangen-Bereiches des Geberzylinders 1 erreicht wird und zugleich mit einem optimierten zweiten, relativ unelastischen und harten Dichtungsbauteil 8 eine Abdichtung im Bereich der Kolbenstange 5 erreicht wird. Diese Abdichtung schafft im Hinblick au die Dichtigkeit und auf die Reibungsverhältnisse optimale Voraussetzungen. Zudem ist der für die Abdichtung erforderliche Bauraum relativ gering.Thus, the invention advantageously allows a seal of the interior of the housing 6 of a master cylinder 1 with respect to the piston rod 5 thereof, wherein the cover of the entire cylinder-piston-piston rod portion of the master cylinder 1 is achieved with a first relatively elastic, bellows-like seal member 7 and at the same time a seal in the region of the piston rod 5 is achieved with an optimized second, relatively inelastic and hard sealing component 8. This seal creates optimal conditions with regard to the tightness and the friction conditions. In addition, the space required for the seal is relatively small.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

a.a.
GeberzylinderMaster cylinder
22
Zylinderbohrungbore
33
Kolbenpiston
44
Bohrungdrilling
55
Kolbenstangepiston rod
66
Gehäusecasing
77
Dichtungsbauteilsealing member
88th
Dichtungsbauteilsealing member
99
Wandbereichwall area
1010
Wandbereichwall area
1111
wulstförmiger Bereichbead-shaped area
1212
Nutgroove
1313
Außendurchmesserouter diameter
1414
Ringring
1515
Nutgroove
1616
Randbereichborder area
1717
Nutgroove
1818
Außendurchmesserouter diameter
1919
faltenbalgartiger Bereichbellows area
2020
BereichArea
2121
EndeThe End

Claims (10)

  1. Arrangement for sealing a master cylinder (1) on the piston rod side, in particular of a hydraulically actuated clutch or brake system, in which arrangement the piston rod (5) which is connected to the piston (3) of the master cylinder (1) is protected against the penetration of dirt into the master cylinder (1) by way of a gaiter-like seal in relation to the housing (6) of the master cylinder (1), the seal comprising a first relatively elastic seal component (7) and a second, relatively inelastic seal component (8), the first seal component (7) being connected on one side in a sealed manner to the housing (6) of the master cylinder (1) and on the other side in a sealed manner to the second seal component (8), characterized in that the second seal component (8) is arranged in a sealed manner on the piston rod (5) and can be displaced on the latter.
  2. Arrangement according to Patent Claim 1, characterized in that the first seal component (7) consists of an elastomer material, preferably of a rubber material.
  3. Arrangement according to Patent Claim 1 or 2, characterized in that the first seal component (7) is of disc-shaped or cap-shaped configuration.
  4. Arrangement according to one of Patent Claims 1 to 3, characterized in that the second seal component (8) is of annular configuration and preferably has at least one circumferential groove (17) on its circumference, into which circumferential groove (17) a radially inner edge region (6) of the first connecting component (7) engages in a sealed manner, which edge region (16) is preferably of bead-shaped configuration.
  5. Arrangement according to one of Patent Claims 1 to 4, characterized in that the second seal component (8) consists of a material which is soft in comparison with the material of the piston rod (5), preferably of a polymer material.
  6. Arrangement according to one of Patent Claims 1 to 5, characterized in that the cap-shaped first seal component (7) firstly acts with a region (11) in a sealed manner on the external diameter of the housing (6) or engages in a sealed manner into a groove (12) which is arranged in the external diameter (13) of the master cylinder (1), whereas it secondly engages with an inner edge region (16) into a groove (17) of the second seal component (8).
  7. Arrangement according to one of Patent Claims 1 to 6, characterized in that the first seal component (7) is of cap-shaped configuration and has an axially running wall region (10) and a radially running wall region (9), in that the axially running wall region (10) engages over a ring (14) which is arranged at least partially in a circumferential groove (15) of the housing (6) of the master cylinder (1), and in that, on its side which faces away from the radially running wall region (9), the axially running wall region (10) of the first seal component (7) has a bead-shaped region (11) which runs radially in the direction of the piston rod (5) and likewise engages over the ring (14).
  8. Arrangement according to Patent Claim 6 or 7, characterized in that the first seal part (7) has a gaiter-like region (19) between the radially running wall region (9) and the bead-shaped edge region (16).
  9. Arrangement according to Patent Claim 8, characterized in that the gaiter-like region (19) is formed by way of a part region which runs from the radially running wall region (9) first of all obliquely in the direction of the piston (3), and by way of an adjoining part region which runs in the opposite direction.
  10. Arrangement according to one of Patent Claims 7 to 9, characterized in that, on its side which faces the radially running wall region (9), the housing (6) has a rounded or pointed end (21), on which the radially running wall region (9) is supported.
EP12743689.7A 2011-08-26 2012-08-06 Arrangement for sealing a master cylinder on the side of the piston rod Not-in-force EP2748042B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011081654A DE102011081654A1 (en) 2011-08-26 2011-08-26 Arrangement for piston rod-side sealing of a master cylinder
PCT/EP2012/003349 WO2013029741A2 (en) 2011-08-26 2012-08-06 Arrangement for sealing a master cylinder on the side of the piston rod

Publications (2)

Publication Number Publication Date
EP2748042A2 EP2748042A2 (en) 2014-07-02
EP2748042B1 true EP2748042B1 (en) 2018-01-24

Family

ID=46634107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12743689.7A Not-in-force EP2748042B1 (en) 2011-08-26 2012-08-06 Arrangement for sealing a master cylinder on the side of the piston rod

Country Status (4)

Country Link
EP (1) EP2748042B1 (en)
DE (1) DE102011081654A1 (en)
IN (1) IN2014DN02149A (en)
WO (1) WO2013029741A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013209141A1 (en) * 2013-05-16 2014-06-18 Carl Zeiss Laser Optics Gmbh Actuator for optical assembly used for inspecting semiconductor wafer manufacturing process, has actuating object that is partially encased in bellows made of elastomer, in gastight manner
DE102015211419A1 (en) * 2015-06-22 2016-12-22 Zf Friedrichshafen Ag Arrangement for sealing an actuator and adapter ring for sealing

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB384724A (en) * 1931-09-17 1932-12-15 Hydraulic Brake Co Improvements in valves, particularly for hydraulic brake systems
DE3529352A1 (en) * 1985-08-16 1987-02-26 Kugelfischer G Schaefer & Co Master cylinder
DE3720410A1 (en) * 1987-06-19 1988-12-29 Teves Gmbh Alfred MASTER CYLINDER
DE4331241B4 (en) * 1993-09-15 2004-02-05 Fte Automotive Gmbh Hydraulic actuation cylinder
DE10341470A1 (en) * 2003-09-05 2005-04-07 Fte Automotive Gmbh & Co. Kg hydraulic cylinders
DE102004058609A1 (en) * 2004-12-03 2006-06-08 Fte Automotive Gmbh Hydraulic cylinder, in particular slave cylinder for a hydraulic clutch actuation for motor vehicles
DE112008002105A5 (en) * 2007-08-30 2010-04-29 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Master cylinder, in particular for the clutch or brake actuation of a motor vehicle
DE102009005830A1 (en) * 2009-01-22 2010-07-29 Fte Automotive Gmbh Device for reducing pressure pulsations
DE102009026766A1 (en) * 2009-06-05 2010-12-16 Zf Friedrichshafen Ag Pressure medium cylinder for an actuator of a motor vehicle with a lockable piston

Also Published As

Publication number Publication date
WO2013029741A2 (en) 2013-03-07
DE102011081654A1 (en) 2013-02-28
EP2748042A2 (en) 2014-07-02
WO2013029741A3 (en) 2013-07-11
IN2014DN02149A (en) 2015-05-15

Similar Documents

Publication Publication Date Title
EP0268624B1 (en) Seal arrangement
DE4439242A1 (en) Sealing element
DE102011101960B4 (en) Fluid pressure device
DE102015201398A1 (en) sealing arrangement
DE102016219592A1 (en) Slave cylinder for a hydraulic release system for actuating a friction clutch
EP2855943B1 (en) Master cylinder
EP2827026B1 (en) Sealing assembly and sealing ring
EP2748042B1 (en) Arrangement for sealing a master cylinder on the side of the piston rod
DE202014004809U1 (en) Linear shock absorber with improved closure element
DE102005041418B4 (en) Hydraulic cylinder, in particular master cylinder of a hydraulic clutch release system
DE102008040996A1 (en) sealing arrangement
WO2019057392A1 (en) Vibration damper having a hydraulic stop
WO2019115029A1 (en) Clutch actuator for actuating a vehicle clutch
DE102013221845A1 (en) Piston-cylinder unit
DE102018214312A1 (en) Piston cylinder unit
EP3322925B1 (en) Piston cylinder arrangement comprising a seal
DE212013000271U1 (en) Seal for a hydraulic piston-cylinder arrangement
DE102017106105A1 (en) Seal for a piston-cylinder arrangement for a clutch
DE102017106106A1 (en) Seal for piston-cylinder arrangement
DE102015215512A1 (en) Pressure cylinder unit, such as clutch master cylinder, with conically shaped support ring
WO2021013292A1 (en) Multiple-piece annular piston for a slave cylinder for the hydraulic actuation of a clutch or a brake
DE102017012105A1 (en) Mechanical seal and unit with such a mechanical seal
DE102012210845A1 (en) Concentric slave cylinder for use in e.g. hydraulic disengaging system of single-friction clutch of motor car, has stripping element including outer and inner stripping regions, which are formed by separate stripping ring
EP1878953A1 (en) Sealing structure
DE102015016752A1 (en) Central release for pneumatic actuation of a vehicle clutch

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140326

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20171027

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 965598

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180215

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502012012075

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20180124

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180424

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180425

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180524

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180424

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502012012075

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20181025

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20180806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180806

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180831

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180831

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20180831

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180831

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 965598

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20120806

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180124

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20210819

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20211020

Year of fee payment: 10

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502012012075

Country of ref document: DE

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230523

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220831

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230301